Answer:
Roast, boast, coast, post. What do you put in a toaster?
You may enter, but you may not come in. I have space, but no room, I have keys, but open no lock. What am I?
I can wake you up in the morning but I require no electricity or winding. What am I?
What force and strength cannot get through, I with my unique teeth can do. What am I?
Find me on body builders or in the drink aisle. What am I?
Written on with words of white, Has the color of the night, Is the teacher's best delight, And a student's daily fright